May 4, 2021
Quantum science has the potential to revolutionize modern technology with more efficient computers, communication, and sensing devices. But challenges remain in achieving these technological goals, especially when it comes to effectively transferring information in quantum systems.
A regular computer consists of billions of transistors, called bits. Quantum computers, on the other hand, are based on quantum bits, also known as qubits, which can be made from a single electron.
Unlike ordinary transistors, which can be either 0 (off) or 1 (on), qubits can be both 0 and 1 at the same time. The ability of individual qubits to occupy these so-called superposition states, where they are in multiple states simultaneously, underlies the great potential of quantum computers. Just like ordinary computers, however, quantum computers need a way to transfer quantum information between distant qubitsand that presents a major experimental challenge.
In a series of papers published in Nature Communications, researchers at the University of Rochester, including John Nichol, an assistant professor of physics and astronomy, and graduate students Yadav Kandel and Haifeng Qiao, the lead authors of the papers, report major strides in enhancing quantum computing by improving the transfer of information between electrons in quantum systems.
In one paper, the researchers demonstrated a route of transferring information between qubits, called adiabatic quantum state transfer (AQT), for the first time with electron-spin qubits. Unlike most methods of transferring information between qubits, which rely on carefully tuned electric or magnetic-field pulses, AQT isnt as affected by pulse errors and noise.
To envision how AQT works, imagine you are driving your car and want to park it. If you dont hit your brakes at the proper time, the car wont be where you want it, with potential negative consequences. In this sense, the control pulsesthe gas and brake pedalsto the car must be tuned carefully. AQT is different in that it doesnt really matter how long you press the pedals or how hard you press them: the car will always end up in the right spot. As a result, AQT has the potential to improve the transfer of information between qubits, which is essential for quantum networking and error correction.
The researchers demonstrated AQTs effectiveness by exploiting entanglementone of the basic concepts of quantum physics in which the properties of one particle affect the properties of another, even when the particles are separated by a large distance. The researchers were able to use AQT to transfer one electrons quantum spin state across a chain of four electrons in semiconductor quantum dotstiny, nanoscale semiconductors with remarkable properties. This is the longest chain over which a spin state has ever been transferred, tying the record set by the researchers in a previous Nature paper.
Because AQT is robust against pulse errors and noise, and because of its major potential applications in quantum computing, this demonstration is a key milestone for quantum computing with spin qubits, Nichol says.
In a second paper, the researchers demonstrated another technique of transferring information between qubits, using an exotic state of matter called time crystals. A time crystal is a strange state of matter in which interactions between the particles that make up the crystal can stabilize oscillations of the system in time indefinitely. Imagine a clock that keeps ticking forever; the pendulum of the clock oscillates in time, much like the oscillating time crystal.
By implementing a series of electric-field pulses on electrons, the researchers were able to create a state similar to a time crystal. They found that they could then exploit this state to improve the transfer of an electrons spin state in a chain of semiconductor quantum dots.
Our work takes the first steps toward showing how strange and exotic states of matter, like time crystals, can potentially by used for quantum information processing applications, such as transferring information between qubits, Nichol says. We also theoretically show how this scenario can implement other single- and multi-qubit operations that could be used to improve the performance of quantum computers.
Both AQT and time crystals, while different, could be used simultaneously with quantum computing systems to improve performance.
These two results illustrate the strange and interesting ways that quantum physics allows for information to be sent from one place to another, which is one of the main challenges in constructing viable quantum computers and networks, Nichol says.
Tags: Arts and Sciences, Department of Physics and Astronomy, John Nichol, quantum computing, quantum physics
Category: Science & Technology
Continue reading here:
- Link between quantum mechanics and ballet - Times of Malta - June 6th, 2021
- Weird World of Quantum Black Holes May Be Radically Different from What Einstein Predicted and Lack Event H - The Daily Galaxy --Great Discoveries... - June 6th, 2021
- Spacetime Crystals: New Mathematical Formula May Solve Old Problem in Understanding the Fabric of the Universe - SciTechDaily - June 6th, 2021
- Celebrating the Class of 2021 | UC San Diego News - UC San Diego Health - June 6th, 2021
- Im No Longer a Spectator to the Unfolding of My Life. - ADDitude - June 6th, 2021
- How Quantum Physics Allows Us To See Back Through Space And Time - Forbes - May 14th, 2021
- Is everything predetermined? Why physicists are reviving a taboo idea - New Scientist - May 14th, 2021
- New evidence for electron's dual nature found in a quantum spin liquid . New experiments conducted at - Princeton University - May 14th, 2021
- A wobbling muon could unlock mysteries of the universe - Vox.com - May 14th, 2021
- Quantum science, particle physics and nanoscale motors awarded support from Eric and Wendy Schmidt Transformative Tech Fund - Princeton University - May 14th, 2021
- Quantum Computing In Finance Where We Stand And Where We Could Go - Science 2.0 - May 14th, 2021
- Pathogenic, auto-immune or viral, all diseases are actually epigenetic - The Times of India Blog - May 14th, 2021
- Outlook on the Quantum Technology Global Market to 2026 - - GlobeNewswire - May 14th, 2021
- Can a Patent Be Valid and Invalid at the Same Time? - Bloomberg Law - May 9th, 2021
- Breaking the Laws of Physics: Steering Light to Places It Isnt Supposed to Go - SciTechDaily - May 9th, 2021
- Are We on the Brink of a New Age of Scientific Discovery? - SciTechDaily - May 9th, 2021
- Can you really put a price on your college major? - The Boston Globe - May 9th, 2021
- Physicist and jazz pianist combines music and science at Rochester - University of Rochester - May 7th, 2021
- On the marvels of physics | symmetry magazine - Symmetry magazine - May 7th, 2021
- What financial crises and quantum mechanisms have in common - The New Times - May 7th, 2021
- MIT Researcher Says UFO Research Could Lead to New Laws of Physics - Futurism - May 7th, 2021
- Collins Aerospace upgrades US Navy C-130 fleet with long-lasting wheels and carbon brakes - PRNewswire - May 7th, 2021
- Andy Weirs New Space Odyssey - The New York Times - May 3rd, 2021
- The coherence of light is fundamentally tied to the quantum coherence of the emitting particle - Science Advances - May 3rd, 2021
- The battle for free will in the face of determinism - The Guardian - May 3rd, 2021
- Tulane part of Navy/Army-funded research on improving communication - News from Tulane - May 3rd, 2021
- A clocks accuracy may be tied to the entropy it creates - Science News Magazine - May 3rd, 2021
- Wellness Wednesday advice: If going to be sad? Don't! - Campus Times - May 3rd, 2021
- Beyond Books: Creative ways to combat the summer slide - Chillicothe Gazette - May 3rd, 2021
- #PulpNonFiction: Advertisers, be clear about what you want to say and why! - Bizcommunity.com - May 3rd, 2021
- Q&A: Are We on the Brink of a New Age of Scientific Discovery? - University of Virginia - May 3rd, 2021
- In Quantum Physics, Reality Really Is What We Choose To Observe - Walter Bradley Center for Natural and Artificial Intelligence - April 21st, 2021
- Multiple Realities | Physics - Denison University - April 21st, 2021
- IISER physicist Prof Arvind is Punjabi University VC - The Tribune - April 21st, 2021
- Theoretical Physicist Prof Arvind appointed Punjabi Varsity Vice Chancellor - The Tribune - April 21st, 2021
- A cosmologist throws light on a universe of bias - Salon - April 21st, 2021
- Recent Reports Of Overturned Scientific Theory Are Premature - Forbes - April 21st, 2021
- Helgoland by Carlo Rovelli - read an exclusive extract - RTE.ie - April 17th, 2021
- Researchers Visualize the Motion of Vortices in Quantum Superfluid Turbulence - SciTechDaily - April 17th, 2021
- Will we ever know exactly how the universe ballooned into existence? - Livescience.com - April 17th, 2021
- 'The Disordered Cosmos', A Contemplation of the Exclusionary Culture of Physics - The Wire Science - April 17th, 2021
- Albert Einstein Death Anniversary: How did the greatest physicists of all time die? - Free Press Journal - April 17th, 2021
- Half Life traces family complexities for a Milwaukee physics teacher - The Globe and Mail - April 17th, 2021
- Scott Aaronson Winner of 2020 ACM Prize In Computing - iProgrammer - April 17th, 2021
- Book Review: A Cosmologist Throws Light on a Universe of Bias - Undark Magazine - April 17th, 2021
- Realization of an ideal Weyl semimetal band in a quantum gas with 3D spin-orbit coupling - Science Magazine - April 17th, 2021
- Quantum computers are revealing an unexpected new theory of reality - New Scientist - April 15th, 2021
- Student's physics homework picked up by Amazon quantum researchers - News - The University of Sydney - April 15th, 2021
- The Big Theoretical Physics Problem At The Center Of The 'Muon g-2' Puzzle - Forbes - April 15th, 2021
- 615 Million Euros Awarded to Quantum Delta NL for Quantum Research in the Netherlands - HPCwire - April 15th, 2021
- The God Equation Review: One String Theory to Rule Them All - The Wall Street Journal - April 15th, 2021
- The Disordered Cosmos review: An insider take on physics and injustice - New Scientist News - April 15th, 2021
- Course explores 'Magic, Witchcraft and Healing' > News > USC Dornsife - USC Dornsife College of Letters, Arts and Sciences - April 15th, 2021
- How matters hidden complexity unleashed the power of nuclear physics - Science News Magazine - April 15th, 2021
- Scientists Perform First-ever Ultracold Atom Interferometry in Space, Leading to Possible Physics Breakthroughs - Science Times - April 15th, 2021
- The windswept German island that inspired quantum physics - Spectator.co.uk - April 6th, 2021
- Junior wins Goldwater scholarship | The Source | Washington University in St. Louis - Washington University Record - April 6th, 2021
- Raytheon Technologies Announces $500 Million Social Impact Initiative - PRNewswire - April 6th, 2021
- Raytheon Technologies to release first quarter results on April 27, 2021 - CapeNews.net - April 6th, 2021
- An Interstellar Trip with Einstein, Newton, and Tesla - EE Times India - April 6th, 2021
- Searching for New Physics in the Subatomic World - SciTechDaily - April 6th, 2021
- QCI Expands Sales and Marketing Team to Accelerate Growth and Advance Enterprise Adoption of Quantum Computing - GlobeNewswire - April 6th, 2021
- Quantum Physics to Disrupt Geospatial Industry over the Coming Decade - GIM International - April 4th, 2021
- Imaginarity: New Paper Says The Imaginary Part Of Quantum Mechanics Can Be Observed - Science 2.0 - April 4th, 2021
- The mystery of the muon's magnetism | symmetry magazine - Symmetry magazine - April 4th, 2021
- Your Guide to Products and Technologies That Are Pseudoscience - Interesting Engineering - April 4th, 2021
- 6 Quantum Computing Stocks to Invest in This Decade - Investment U - April 4th, 2021
- What if youre living in a simulation, but theres no computer? - The Next Web - April 4th, 2021
- Quantum physics: what to expect - Study International News - March 31st, 2021
- Helgoland by Carlo Rovelli review a meditation on quantum theory - The Guardian - March 31st, 2021
- 'Spacekime theory' could speed up research and heal the rift in physics - Big Think - March 31st, 2021
- Some Black Holes Are Impossible In Our Universe - Forbes - March 31st, 2021
- Scientists Have Simulated The Primordial Quantum Structure of Our Universe - ScienceAlert - March 31st, 2021
- Post-Doctoral Research Associate Experimental Condensed Matter Physics job with ROYAL HOLLOWAY, UNIVERSITY OF LONDON | 250229 - Times Higher Education... - March 31st, 2021
- No free will, no ideas: Physicist Brian Greene reduces everything to 'particles and fields' - National Catholic Reporter - March 31st, 2021
- Carlo Rovelli on his search for the theory of everything - Prospect - March 31st, 2021
- Do Alternate Realities Exist? This Artist's Machines Are Ready to Find Out - PCMag - March 31st, 2021
- After 50 Years, Physicists Confirm The Existence of an Elusive Quasiparticle - ScienceAlert - March 25th, 2021
- Helgoland by Carlo Rovelli review the mysteries of quantum mechanics - The Guardian - March 25th, 2021
- Quantum Week 2021 Unveils the Latest in Quantum Computing and Engineering - PRNewswire - March 25th, 2021